Microsoft has finally announced the list of the 213 Xbox 1 games playable on Xbox 360 at launch. A software emulator is required for each original Xbox game, which means you need an HDD for these games to work on Xbox 360. While it is expected that the list will grow in future via Live update, as of now it lacks first-party titles such as Project Gotham Racing, and other popular titles such as DOAU/X, Doom 3, Far Cry, KUF, Panzer Dragoon Orta, the Splinter Cell series, and the SW: Battlefront series